my first guess you will damage your controller look become reality,
first mistake you have power up all unit,
you no read the user manual for few times,
The recomendation, DO and DON'T from user manual,
when questioning where the Ground on Stepper Drive termination,
you answer you have connected,
possibilty you power up the unit,probaly yes.
i have attached picture on post #11 from user manual,
read again the user manual,
are Tiny Control and AMCI same product?
you need separate Power Supply 1 for Stepper Drive and 1 for Step/Dir Signal.
first mistake you have power up all unit,
you no read the user manual for few times,
The recomendation, DO and DON'T from user manual,
when questioning where the Ground on Stepper Drive termination,
you answer you have connected,
possibilty you power up the unit,probaly yes.
i have attached picture on post #11 from user manual,
read again the user manual,
are Tiny Control and AMCI same product?
you need separate Power Supply 1 for Stepper Drive and 1 for Step/Dir Signal.